摘要
芹山电站#2水轮发电机组在投产运行1年后,机组在制动停机完成且风闸复归后,又出现了微小转动的现象。在这种情况下,有可能造成低转速下推力轴承烧瓦的事故。在检修时,发现机组活动导叶立面止漏面气蚀磨损严重,造成停机困难。对问题进行了分析后,对导叶立面止漏面气蚀磨损区进行了堆焊不锈钢及打磨处理。运行检测结果证明,处理效果较好,确保了机组的安全稳定运行。
The hydrogenerator unit No. 2 of Qinshan Hydropower Station has commissioned for 1 year, while the machine rotated slightly again after it had been shut off and the air brake had been reverted. This may lead to failure of thrust-bearing because of low speed. By inspecting, it was found that the guide vans＇s perpendicular surface, i.e. waterproof surface, was cavitated badly, so the unit was hard to shut down. After analyzing this problem, the meth- ods of resurfacing welding for the cavitated area and then burnishing were implemented. The operation has proved that： the disposal effect is preferable, and the unit＇s safety and stability in operation are insured.
出处
《华电技术》
CAS
2009年第5期20-21,共2页
HUADIAN TECHNOLOGY
关键词
水轮发电机组
气蚀
分析
堆焊
打磨
应用效果
hydrogenerator unit
cavitation erosion
analysis
resurfacing welding
burnish
application effect
